Effect of Pressure on Carbon monoxide Oxidation on Titania Supported Platinum Nanoparticles Catalyst

Abstract

Thermographic testing methodology was developed to facilitate measurements of particle dimension and substrate influence in heterogeneous catalysts. A screening chip with several areas of less stress silicon nitride membranes which display less heat conductivity and heat capacity was used. Heat produced during the reaction on catalysts deposited on membranes was established through an IR camera which gave the value of the turnover frequency. The effect of pressure on CO conversion on titania-supported Pt particles of different dimensions was measured on 120 catalysts concurrently. The reaction was studied at various O₂ and CO pressures at 170 ℃ and 240 ℃. At these temperature conditions, activity increased with the increase of O₂ and CO pressure, in agreement with previous reports.